From d51cc75f35394ecfde1a4e8cfc422f09a9f40541 Mon Sep 17 00:00:00 2001
From: spaced4ndy <8711996+spaced4ndy@users.noreply.github.com>
Date: Mon, 30 Mar 2026 18:47:57 +0400
Subject: [PATCH] core, ui: prohibit to invite contact to channel

---
 apps/ios/Shared/Views/Chat/ChatView.swift                      | 2 +-
 .../kotlin/chat/simplex/common/views/chat/ChatView.kt          | 2 +-
 src/Simplex/Chat/Library/Commands.hs                           | 3 ++-
 src/Simplex/Chat/Library/Subscriber.hs                         | 2 ++
 4 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/apps/ios/Shared/Views/Chat/ChatView.swift b/apps/ios/Shared/Views/Chat/ChatView.swift
index ada2e8c459..8738d5e25b 100644
--- a/apps/ios/Shared/Views/Chat/ChatView.swift
+++ b/apps/ios/Shared/Views/Chat/ChatView.swift
@@ -578,7 +578,7 @@ struct ChatView: View {
                 HStack {
                     contentFilterMenu(withLabel: false)
                     Menu {
-                        if groupInfo.canAddMembers {
+                        if groupInfo.canAddMembers && !groupInfo.useRelays {
                             if (chat.chatInfo.incognito) {
                                 groupLinkButton()
                                     .appSheet(isPresented: $showGroupLinkSheet) {
diff --git a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt
index 883975a345..f9573c0ed0 100644
--- a/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt
+++ b/apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt
@@ -1281,7 +1281,7 @@ fun BoxScope.ChatInfoToolbar(
     }
     is ChatInfo.Group -> {
       // Add members / group link moved to menu
-      if (chatInfo.groupInfo.canAddMembers) {
+      if (chatInfo.groupInfo.canAddMembers && !chatInfo.groupInfo.useRelays) {
         if (!chatInfo.incognito) {
           menuItems.add {
             ItemAction(stringResource(MR.strings.icon_descr_add_members), painterResource(MR.images.ic_person_add_500), onClick = {
diff --git a/src/Simplex/Chat/Library/Commands.hs b/src/Simplex/Chat/Library/Commands.hs
index a880c17ef8..d488b6e990 100644
--- a/src/Simplex/Chat/Library/Commands.hs
+++ b/src/Simplex/Chat/Library/Commands.hs
@@ -2425,9 +2425,10 @@ processChatCommand vr nm = \case
   APIAddMember groupId contactId memRole -> withUser $ \user -> withGroupLock "addMember" groupId $ do
     -- TODO for large groups: no need to load all members to determine if contact is a member
     (group, contact) <- withFastStore $ \db -> (,) <$> getGroup db vr user groupId <*> getContact db vr user contactId
-    assertDirectAllowed user MDSnd contact XGrpInv_
     let Group gInfo members = group
         Contact {localDisplayName = cName} = contact
+    when (useRelays' gInfo) $ throwCmdError "can't invite contact to channel"
+    assertDirectAllowed user MDSnd contact XGrpInv_
     assertUserGroupRole gInfo $ max GRAdmin memRole
     -- [incognito] forbid to invite contact to whom user is connected incognito
     when (contactConnIncognito contact) $ throwChatError CEContactIncognitoCantInvite
diff --git a/src/Simplex/Chat/Library/Subscriber.hs b/src/Simplex/Chat/Library/Subscriber.hs
index f856bfd915..a6bada4f49 100644
--- a/src/Simplex/Chat/Library/Subscriber.hs
+++ b/src/Simplex/Chat/Library/Subscriber.hs
@@ -2314,6 +2314,8 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       toView $ CEvtNewChatItems user [AChatItem SCTGroup (msgDirection @d) cInfo ci]
 
     processGroupInvitation :: Contact -> GroupInvitation -> RcvMessage -> MsgMeta -> CM ()
+    processGroupInvitation _ct GroupInvitation {groupProfile = GroupProfile {groupLink = Just _}} _msg _msgMeta =
+      messageError "x.grp.inv: can't invite to channel"
     processGroupInvitation ct inv msg msgMeta = do
       let Contact {localDisplayName = c, activeConn} = ct
           GroupInvitation {fromMember = (MemberIdRole fromMemId fromRole), invitedMember = (MemberIdRole memId memRole), connRequest, groupLinkId} = inv